The How I Met Your Mother actor had previously promised a "pretty epic" opener this year, and proceeded to do just that.

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His routine began with a nod to last year's top musical Once, joking: "I wouldn't be here if someone else hadn't passed on hosting. So special thanks to Shia LaBeouf for this opportunity," referencing the actor's departure from the Broadway show Orphans.

The 39-year-old then performed a fast-paced musical act featuring the cast of many shows including Jersey Boys and Matilda.